IL3285/IL3222
Fractional Load Passive Input RS-485 and RS-422 Isolated Transceivers
Functional Diagrams
DE
V
COIL1
D
R
RE
V
COIL2
A
B
IL3285
DE
V
COIL1
D
R
RE
Y
Z
V
COIL2
A
B
Features
•
3 V to 5 V power supplies
•
5 Mbps data rate
•
⅛
unit load
•
15 kV bus ESD protection
•
2,500 V
RMS
isolation (1 minute)
•
20 kV/µs typical common mode rejection
•
No carrier or clock for low EMI emissions and susceptibility
•
−40°C
to +85°C temperature range
•
Thermal shutdown protection
•
UL 1577 recognized; IEC 60747-5-5 (VDE 0884) certified
•
0.15", 0.3", or True 8™ mm 16-pin SOIC packages
Applications
•
High node-count networks
•
Security networks
•
Building environmental controls
•
Industrial control networks
•
Gaming systems
IL3222
IL3285 Truth Table
DE
V
(A-B)
≥
200 mV
H
≤−200
mV
H
≥
200 mV
L
≤−200
mV
L
X
X
Open
L
Z = High Impedance
D
R
H
H
L
L
X
H
X
L
X
Z
X
H
X = Irrelevant
RE
L
L
L
L
H
L
Mode
Drive
Drive
Receive
Receive
X
Receive
Description
The IL3285 and IL3222 are galvanically isolated,
differential bus transceivers designed for bidirectional data
communication over balanced transmission lines. The
devices use NVE’s patented* IsoLoop spintronic Giant
Magnetoresistance (GMR) technology. The IL3285 delivers
at least 1.5 V into a 54
Ω
load, and the IL3222 at least 2 V
into a 100
Ω
load for excellent data integrity over long
cables. These devices are also compatible with 3.3 V input
supplies, allowing interface to standard microcontrollers
without additional level shifting.
A unique ceramic/polymer composite barrier provides
excellent isolation and virtually unlimited barrier life.
IL 3222 Receiver
RE
R
V
(A-B)
H
Z
X
L
H
≥
200 mV
L
L
≤−200
mV
L
H
Open
IL3222 Driver
DE
D
L
X
H
H
H
L
V
(Y-Z)
Z
≥
200 mV
≤−200
mV
Both the IL3285 and IL3222 have current limiting and
thermal shutdown features to protect against output short
circuits and bus contentions that may cause excessive power
dissipation. The receivers also incorporate a “fail-safe if
open” design, ensuring a logic high on R if the bus lines are
disconnected or “floating.”
Receiver input resistance of 96 kΩ is eight times the RS-485
“Unit Load” (UL) minimum of 12 kΩ. Thus these products
are known as “one-eighth UL” transceivers. There can be up
to 256 on a network while still complying with the RS-485
loading specification.
REV. Q
Selection Table
Full/Half
Model
Duplex
IL3285
half
IL3222
full
No. of Devices
Allowed on Bus
256
256
Data Rate
Mbps
5
5
Fail-Safe
yes
yes
IsoLoop
®
is a registered trademark of NVE Corporation.
*U.S. Patent numbers 5,831,426; 6,300,617 and others.
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
www.isoloop.com
iso-info@nve.com
©NVE Corporation
IL3285/IL3222
Absolute Maximum Ratings
Operating at absolute maximum ratings will not damage the device. However, extended periods of operation at the absolute maximum ratings may affect
performance and reliability.
Parameters
Symbol
Min.
Typ.
Max.
Storage Temperature
T
S
−55
150
Ambient Operating Temperature
T
A
−40
85
Voltage Range at A or B Bus Pins
−7
12
(1)
Supply Voltage
V
DD
1
, V
DD
2
−0.5
7
Digital Input Voltage
−0.5
V
DD
+0.5
Digital Output Voltage
−0.5
V
DD
+1
ESD Protection
±15
Input Current
I
IN
−25
+25
ESD (all bus nodes)
15
Note 1. All voltage values are with respect to network ground except differential I/O bus voltages.
Units
°C
°C
V
V
V
V
kV
mA
kV
Test Conditions
HBM
Recommended Operating Conditions
Parameters
Supply Voltage
Ambient Operating Temperature
Input Voltage at any Bus Terminal
(separately or common mode)
Input Threshold for Output Logic
High
Input Threshold for Output Logic Low
Differential Input Voltage
High-Level Output Current (Driver)
High-Level Digital Output Current
(Receiver)
Low-Level Output Current (Driver)
Low-Level Digital Output Current
(Receiver)
Ambient Operating Temperature
Digital Input Signal Rise, Fall Times
Symbol
V
DD
1
V
DD
2
T
A
V
I
V
IC
I
INH
I
INL
V
ID
I
OH
I
OH
I
OL
I
OL
T
A
t
IR
,t
IF
Min.
3.0
4.5
−40
Typ.
Max.
5.5
5.5
85
12
−7
0.8
+12/−7
60
8
60
8
85
1
Units
V
°C
V
mA
mA
V
mA
mA
mA
mA
°C
μs
Test Conditions
1.5
5
−60
−8
−60
−8
−40
3.5
Insulation Specifications
Parameters
Comparative Tracking Index
Endurance Voltage
AC
(Maximum Working Voltage
for Indefinite Life)
DC
Creepage Distance 0.15" SOIC
(external)
0.3" SOIC
Total Barrier Thickness (internal)
Barrier Resistance
Barrier Capacitance
Leakage Current
Symbol
CTI
V
IO
Min.
≥175
1000
1500
4.03
8.03
0.012
Typ.
Max.
Units
V
V
RMS
V
DC
8.3
0.013
>10
14
7
0.2
mm
mm
Ω
pF
μA
Test Conditions
Per IEC 60112
At maximum
operating temperature
Per IEC 60601
500 V
f = 1 MHz
240 V
RMS
, 60 Hz
R
IO
C
IO
2
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
www.isoloop.com
iso-info@nve.com
©NVE Corporation
IL3285/IL3222
Safety Approvals
IEC 60747-5-5 (VDE 0884)
(File Number 5016933-4880-0001)
•
Working Voltage (V
IORM
) 600 V
RMS
(848 V
PK
); basic insulation; pollution degree 2
•
Transient overvoltage (V
IOTM
) and surge voltage (V
IOSM
) 4000 V
PK
•
Each part tested at 1590 V
PK
for 1 second, 5 pC partial discharge limit
•
Samples tested at 4000 V
PK
for 60 sec.; then 1358 V
PK
for 10 sec. with 5 pC partial discharge limit
IEC 61010-1
(Edition 2; TUV Certificate Numbers N1502812; N1502812-101)
Reinforced Insulation; Pollution Degree II; Material Group III
Part No. Suffix
-3
None
Package
SOIC
Wide-body SOIC/True 8™
Working Voltage
150 V
RMS
300 V
RMS
UL 1577
(Component Recognition Program File Number E207481)
Each part tested at 3000 V
RMS
(4240 V
PK
) for 1 second; each lot sample tested at 2500 V
RMS
(3530 V
PK
) for 1 minute
Soldering Profile
Per JEDEC J-STD-020C, MSL 1
Electrostatic Discharge Sensitivity
This product has been tested for electrostatic sensitivity to the limits stated in the specifications. However, NVE recommends that all integrated
circuits be handled with appropriate care to avoid damage. Damage caused by inappropriate handling or storage could range from performance
degradation to complete failure.
3
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
www.isoloop.com
iso-info@nve.com
©NVE Corporation
IL3285/IL3222
IL3285-3 Pin Connections (0.15" SOIC Package)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
V
DD1
GND
1
R
RE
DE
V
COIL1
D
NC
GND
2
NC
V
DD2
A
B
NC
GND
2
V
COIL2
Input power supply
Ground return for V
DD1
Output data from bus
Read enable
(if RE is high, R is high impedance)
Drive enable
Coils for DE and D (connect to V
DD1
)
Data input to bus
No internal connection
Ground return for V
DD2
(internally connected to pin 15)
No internal connection
Output power supply
Non-inverting bus line
Inverting bus line
No internal connection
Ground return for V
DD2
(internally connected to pin 9)
Coil for R
RE
DE
V
COIL1
D
NC
B
A
V
DD2
NC
GND
2
V
DD1
GND
1
R
V
COIL2
GND
2
NC
IL3285-3
IL3222-3 Pin Connections (0.15" SOIC Package)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
V
DD1
GND
1
R
RE
DE
V
COIL1
D
NC
GND
2
Y
V
DD2
Z
B
A
GND
2
V
COIL2
Input power supply
Ground return for V
DD1
Output data from bus
Read enable
(if RE is high, R is high impedance)
Drive enable
Coils for DE and D (connect to V
DD1
)
Data input to bus
No internal connection
Ground return for V
DD2
(internally connected to pin 15)
Non-inverting driver bus line
Output power supply
Inverting driver bus line
Inverting receiver bus line
Non-inverting receiver bus line
Ground return for V
DD2
(internally connected to pin 9)
Coil for R
RE
DE
V
COIL1
D
NC
B
Z
V
DD2
Y
GND
2
V
DD1
GND
1
R
V
COIL2
GND
2
A
IL3222-3
4
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
www.isoloop.com
iso-info@nve.com
©NVE Corporation
IL3285/IL3222
IL3285 Pin Connections (0.3" SOIC Package)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
V
DD1
GND
1
R
RE
DE
V
COIL1
D
GND
1
GND
2
NC
V
DD2
A
B
NC
GND
2
V
COIL2
Input power supply
Ground return for V
DD1
Output data from bus
Read enable
(if RE is high, R is high impedance)
Drive enable
Coils for DE and D (connect to V
DD1
)
Data input to bus
Internally connected to pin 2 for 0.3" package;
no internal connection on 0.15" IL3285-3
Ground return for V
DD2
(internally connected to pin 15)
No internal connection
Output power supply
Non-inverting bus line
Inverting bus line
No internal connection
Ground return for V
DD2
(internally connected to pin 9)
Coil for R
V
DD1
GND
1
R
RE
DE
V
COIL1
D
GND
1
V
COIL2
GND
2
NC
B
A
V
DD2
NC
GND
2
IL3285
IL3222 Pin Connections (0.3" SOIC Package)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
V
DD1
GND
1
R
RE
DE
V
COIL1
D
GND
1
GND
2
Y
V
DD2
Z
B
A
GND
2
V
COIL2
Input power supply
Ground return for V
DD1
Output data from bus
Read enable
(if RE is high, R is high impedance)
Drive enable
Coils for DE and D (connect to V
DD1
)
Data input to bus
Internally connected to pin 2 for 0.3" package;
no internal connection on 0.15" IL3222-3
Ground return for V
DD2
(internally connected to pin 15)
Non-inverting driver bus line
Output power supply
Inverting driver bus line
Inverting receiver bus line
Non-inverting receiver bus line
Ground return for V
DD2
(internally connected to pin 9)
Coil for R
V
DD1
GND
1
R
RE
DE
V
COIL1
D
GND
1
V
COIL2
GND
2
A
B
Z
V
DD2
Y
GND
2
IL3222
5
NVE Corporation
11409 Valley View Road, Eden Prairie, MN 55344-3617
Phone: (952) 829-9217
www.isoloop.com
iso-info@nve.com
©NVE Corporation
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